Technicians completed testing on the assembling of the lab and the rocket after they had been separately delivered to the launch centre in July. The centre will continue testing the rocket and inject the required propellent before the launch.

Tiangong-2 — which can enable two astronauts to live in space for 30 days, nearly double the national record for space stay — is capable of receiving manned and cargo spaceships and will be used for testing systems and processes for mid-term space stays and refuelling.

It will also be involved in experiments on aerospace medicine, space sciences, on-orbit maintenance and space station technologies.

China’s first space lab Tiangong-1, which was launched in September 2011, ended its data service earlier this year. It had docked with Shenzhou-8, Shenzhou-9 and Shenzhou-10 spacecraft and undertaken a series of experiments.